<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" left-arrow title="黑马头条"></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="loading">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div class="article-detail markdown-body" v-else-if="detailObj.title">
        <!-- 文章标题 -->
        <h1 class="article-title">{{ detailObj.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="detailObj.aut_photo"
          />
          <div slot="title" class="user-name">{{ detailObj.aut_name }}</div>
          <div slot="label" class="publish-date">{{ detailObj.pubdate }}</div>
          <followUser
            :is-followed="detailObj.is_followed"
            @updateFollowed="detailObj.is_followed = $event"
            :aut-id="detailObj.aut_id"
          ></followUser>
          <!-- 关注的组件 -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div
          class="article-content"
          v-html="detailObj.content"
          ref="article-content"
        ></div>
        <van-divider>正文结束</van-divider>
        <!-- 文章评论列表 -->
        <commentList
          :art-id="detailObj.art_id"
          @onloadSuccess="totalCount = $event.total_count"
          :list="commentList"
          @reply-click="onReplyClick"
        ></commentList>
        <!-- 文章评论列表 -->
        <!-- 底部区域 -->
        <div class="article-bottom">
          <van-button
            class="comment-btn"
            type="default"
            round
            size="small"
            @click="isPostShow = true"
            >写评论</van-button
          >
          <van-icon name="comment-o" :badge="totalCount" color="#777" />
          <collectArticle
            v-model="detailObj.is_collected"
            :art-id="detailObj.art_id"
          ></collectArticle>
          <likeArticle
            v-model="detailObj.attitude"
            :art-id="detailObj.art_id"
          ></likeArticle>
          <van-icon name="share" color="#777777"></van-icon>
        </div>
        <!-- /底部区域 -->
        <van-popup v-model="isPostShow" position="bottom">
          <commentPost :target="detailObj.art_id" @postSuccess="postSuccess" />
        </van-popup>
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="errStatus === 404">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else>
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="loadArticleById"
          >点击重试</van-button
        >
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <!-- 评论回复 -->
    <van-popup v-model="isReplyShow" position="bottom" style="height:100%;">
      <commentReply v-if="isReplyShow" :comment="currentComment" @close="isReplyShow = false"/>
    </van-popup>
    <!-- 评论回复 -->
  </div>
</template>

<script>
import { getArticleById } from "@/api/search.js";
import { ImagePreview } from "vant";
import followUser from "@/components/follow-user/index.vue";
import collectArticle from "@/components/collect-article/index.vue";
import likeArticle from "@/components/like-article/index.vue";
import commentList from "@/views/article/components/comment-list.vue";
import commentPost from "@/views/article/components/comment-post.vue";
import commentReply from '@/views/article/components/comment-reply.vue';

export default {
  name: "ArticleIndex",
  components: {
    followUser,
    collectArticle,
    likeArticle,
    commentList,
    commentPost,
    commentReply,
  },
  props: {
    articleId: {
      type: [Number, String, Object],
      required: true,
    },
  },
  data() {
    return {
      detailObj: {}, //文章详情的数据
      loading: true, //控制文章的加载
      images: [],
      totalCount: 0,
      isPostShow: false, //控制评论的弹出层
      commentList: [], //这是评论列表的数组
      isReplyShow:false,
      currentComment:{},//评论回复的组件
    };
  },
  computed: {},
  watch: {},
  created() {
    this.loadArticleById();
  },
  mounted() {},
  methods: {
    async loadArticleById() {
      this.loading = true;
      try {
        const { data } = await getArticleById(this.articleId);
        // console.log(data)
        this.detailObj = data.data;
        // console.log(this.detailObj, "这是用户的详细信息");
        // console.log(this.detailObj.content)
        setTimeout(() => {
          this.preview();
        }, 0);
        // 初始化图片点击预览
      } catch (err) {
        // console.log(err);
        if (err.response.status == 404) {
          this.errStatus = 404;
        }
      }
      // 无论成功失败,都需要关闭loading
      this.loading = false;
    },
    preview() {
      const imgs = document.querySelectorAll("img");
      // console.log(imgs,"这是页面所有的imgs标签")
      imgs.forEach((img, index) => {
        // console.log(img)
        this.images.push(img.src);
        img.addEventListener("click", () => {
          ImagePreview({
            images: this.images,
            startPosition: index,
          });
        });
      });
    },
    postSuccess(data) {
      // 用户输入完成之后,立刻关闭弹窗.
      this.isPostShow = false;
      // 用户输入完成之后,把后台返回的数据添加到评论列表的数组当中
      this.commentList.unshift(data.new_obj);
    },
    onReplyClick(comment){
      // console.log(comment,'11111');
      this.currentComment = comment;
      this.isReplyShow = true;
    },
  },
};
</script>

<style scoped lang="less">
@import url("./markdown.css");
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
